Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c320b8c7c4e1cc…

MALICIOUS

PDF

88.8 KB Created: 2021-02-08 18:45:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d95574d178ee23edd954d0da2e59bfb4 SHA-1: 2b3a44f94b580ea4d46a4b9394d95c94653c1710 SHA-256: 28c320b8c7c4e1cc64e30c2a628c5518a8428cb7758aed7681a1e47044c5d6d0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF with a high ML classification and ClamAV detection, indicating malicious intent. It contains an embedded URL pointing to 'crophysi.ru', which is likely used to redirect users to a phishing or malware-hosting site. The document body, though heavily obfuscated, appears to reference a physics topic, suggesting a lure to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/aws?utm_term=movimiento+rectilineo+uniforme+acelerado+wikipedia PDF link annotation
    • http://sodazetibup.iblogger.org/96696793576.pdfIn PDF document text
    • http://diniguwoweka.iblogger.org/billboard_psd_template.pdfIn PDF document text
    • http://soxexuv.iblogger.org/bilenemu.pdfIn PDF document text
    • https://vidijizuv.weebly.com/uploads/1/3/0/7/130776341/88e1dbb3544.pdfIn PDF document text
    • https://cdn.sqhk.co/lulamekajasu/ajhGyie/punjabi_ringtone_2020_download_pagalworld.pdfIn PDF document text
    • http://1cats.space/cnc_machine_simulator_free_download9yfme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mumazidujinodu.epizy.com/lugew.pdfIn PDF document text
    • http://wuwomuwudawim.epizy.com/kuttymovies_2019_tamil_movie.pdfIn PDF document text
    • http://dozonexupiwef.epizy.com/animals_in_english_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/schengen_visa_france_application_form_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/68969939851.pdfIn PDF document text
    • http://bubomikofar.epizy.com/2526940010.pdfIn PDF document text
    • http://segixiw.epizy.com/interference_of_light_experiment_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/buffalo_bills_injury_report_week_14.pdfIn PDF document text
    • http://pavebutom.epizy.com/thor_stormbreaker_hd_wallpapers.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/pitegegejabutawi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 5344 bytes
SHA-256: a7659bf71a15bcc82b7e1e82da1984573642894487e976c56fecf3a7fc9f438c
font_01_sfnt_off0001122d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122D 13380 bytes
SHA-256: 2d590698e401d12779da27116f3bba5d5b8d333d201442987cb865a6fc37fbb9
font_02_sfnt_off00013e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E73 16148 bytes
SHA-256: 2a9ffb99171cc61de06c299844801b5d85354357ca4dcdb38f740fd9d0f52753

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